Feed-water system for steam-boilers.



w. A. GIBSON.

FEED WATER SYSTEM FOR STEAM BOILERS.

APPLICATION FILED MAR. '(0. T916.

atented May 15, 1917.

'ran enana Parana ernten WILLIAM ASA GIBSON, OF PEORIA, ILLINOIS, .ASSIGNOR OF ONELTHIRD T0 GEORGE B. KOONTZ AND ONE-THIRD TO JOHN C. SCHLEICH, BOTH OF IEORIA, ILLINOIS.

FEED-WATER SYSTEM FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented May 15, 1921"?.

applicationmea March 1o, 1916. serial No. sam..

This invention relates to improvementsin feed water systems for steam boilers and especially with reference to the provision of an overhead feed induction valve and heater by means of which feed water is supplied to a locomotive or other boiler, is heated, by .I

being commingled with steam in the steam space of the boiler and is supplied to the boiler ina highly heated condition andA commingled with condensed steam so that the feed Water is raised to substantially the same temperature asthc live stea'm in the boiler .and in this condition is supplied to the boiler by the valve from a vpoint above the water line.

One object of the invention is to provide an improved feed water system for boilers by means of which foaming is prevented.

Another object is to provide improved feed water heating means which obviates danger of boiler explosion. f

Another object is to provide improved feed water heating means which eects an economy in fuel.

Another object is -to provide improved feed water heating means which prevents crawling of the boiler" lues, greatly diminishes the expansion-ofthe sheets and flues, and also diminishes leakage such as is 1au`sed by undue expansion ofthe sheets and The invention consists inthe construction, combination, and arrangement of devices, hereinafter described?V and claimed.V

In the accompanyingv drawings Figure 1 is an end elevation of my improved overhead feed i'nduction and heating valve.

Fig. 2 is a sectional view of the same,

showing the valve arranged in the steam space of a boiler, a portion of the boiler being indicated in cross section.

In accordance with my invention, the

n boiler 1 which may be a locomotive boiler,

as here shown, or any other form of steam boiler, is provided with a feed water pipe 2 which leads from an injector or pump of any suitable form and which is not here shown, to an induction and heating valve 4 which is located on the upper side o-f the holler and near the front end thereof, or in other words, islocated at a distance from the fire boX or furnace. The' feed pipe is in practice provided withv a check valve of any .suitable form to close against back pressure.

The valve 4 has a cylindrical body or barrel 6 provided with an eXteriorly threaded portion 7 adapting the valve to be screwed in a threaded opening in the top of the boiler. Any other suitable means may be employed for securing the induction and heating valve in place. The body or barrel 6 is formed with .a downwardly contracting feed nozzle 8.

A funnel 9 which forms a steam and water mixing and a speed accelerating element is arranged around and extends downwardly from the nozzle 8 with its major portion in spaced relation thereto, to form a chamber 10, the upper end ofthe funnel being united to the downwardly tap'eringwall of the nozzle and being provided with steam intake openings 11. The funnel has its wall progressively thickened downwardly so that the lower end of the chamber 10 is of less diameter than the upper end of said chamber and the funnel is provided near its lower. end with discharge openings 12. In the lower end of the funnel is a spreading and speed accelerating cone 13 which is here shown as a plug screw in the lower end of the funnel as at 14. rlhe funnel and the ma jor portion of the nozzle .are arranged in the steam space 415 of the boiler, above the water line 16.

The induction and heating valve is here shown as provided with a T-head 17 forming oppositely extending water inlet arms 18 to which the feed water pipe 2 is connected by' branch pipes 19. A partition 20 is formed between the inner ends ofthe arms 18 and a partition 21 extends downwardly in the center of the ynozzle 8, below the partition 20. Ports 22 communicate.

with the arms 18 respectively and with the ing and the valves 23 are opened, feed water is forced into and through the nozzle 8 of the induction and heating valve 4. The Water is crowded into the nozzle by the partition 21 and owing to the contracted lower end of the nozzle, which acts on the principle of the vena, contract@ and also owing to the pressure of the water and the gravity thereof, issues from the nozzle at high speed. The apex of the spreading cone 13 is a slight distance below the center of the discharge end of the nozzle so that the cone acts to spread the feed water and to accelerate the speed thereof and direct the water to the openings 12. Live steam, at high pressure, in the ,steam space of the boiler entersl the chamber 10 through the openings 11 and becomes commingled with the feed water as it passes downwardly over the cone. The commingling of the water with the steam in the lower portion of the chamber 10 causes a partial condensation of the steam and hence the velocity of the steam as it enters the openings 11 is very much greater than that of the partially condensed steam, which, together with the water is discharged through the openings 12 and hence the steam forces the feed water, saturated with steam, into the boiler at a point above the water line and owing to the intermediate comminglin'g of the steam with the feed water, the feed water is heated and hence the Water in the boiler is kept at approximately the same temperature at all points in the boiler, 'foaming is prevented, crawling" of the flues is prevented, the-danger of boiler explosion is very greatly lessened, an economy in fuel is effected, and unequal contraction and eX- pansion of the sheets and lues is prevented, so that leakage is greatly diminished.

Foaming is prevented by my induction and heating valve because the heat imparted to the feed water thereby causes a rapid preci itation of the chlorids and carbonates of ca cium and sodium, thus preventing saponification in the water in the boiler.

Moreover, a. uniform circulation is caused water as it passes through the induction and heating valves with the live steam supplied,

thereto from the steam space of the boiler. Having described the invention, what is claimed is: g .l

1. In ka steam boiler feed-water system, a nozzleopen at its outer end and arranged to discharge in the steam space of a boiler Y and a structure extending nin the same directlon as the nozzle and providing a chamber around the discharge end of the nozzle, said structure having a steam inlet opening to said chamber at a point above the discharge end of the nozzle and alsoY having a discharge opening leading from said chamber at a point below the discharge end of the nozzle, and a water spreading and speed ac` cessory element arranged between the said discharge opening of the chamber and a point opposite and spaced from the discharge end of the nozzle.

2. In a steam boiler feed water system, a nozzle open at its outer end and arranged to discharge in the steam spacey of a boiler and a structure extending inthe same direction as the nozzle and providing a chamber around the discharge end ofthe nozzle, said structure having a steam inlet opening to said chamber at a point'above the discharge end of the nozzle and also having a discharge opening leading from said chamber at a point below the discharge end of the nozzle, and a `water spreading and speed accessory cone a-rranged'between the said discharge opening of the chamber and a point opposite and spaced from the` discharge end of the nozzle.

In testimony whereof I afIiX my signature in presence of two witnesses.

WILLIAM AsA GIBsoN.

Witnesses:

PATRICK J. RYAN, O. J. DOLAN. 

